01 -
Line an 8x8 inch square pan with parchment paper and set aside.
02 -
Combine creamy peanut butter and softened butter in a large bowl using an electric hand mixer until smooth. Gradually incorporate powdered sugar while mixing. Add vanilla extract and salt, then continue mixing until the mixture is well combined and slightly crumbly.
03 -
Press the peanut butter mixture evenly into the prepared pan, smoothing the surface gently.
04 -
Place chocolate chips and butter in a microwave-safe bowl. Heat in 30-second intervals, stirring between each, until fully melted and smooth.
05 -
Pour the melted chocolate evenly over the peanut butter layer, spreading with an offset spatula to cover completely.
06 -
Refrigerate the bars for 10 to 20 minutes until the chocolate is firm. Warm a sharp knife in hot water, dry thoroughly, and slice the bars into 16 portions, wiping the knife between cuts for clean edges.